Machine fob polishing stone and glass



2 Sheets-Sheet 1.

.. G. H. WOOD. I MACHINE FOR SOOURING-AND POLISHING STONE, GLASS, M.

No. 17,993. A Patented Aug. 11, 1867.

'2 Sheets Sheet 2.

G. H. WOOD.

MACHINE FOR SCOURING AND POLISHING STONRGLASS, &c.

No. 17,993. Patented Aug. 11, 1857.

UNITED STATES PATENT OFFICE.

GEORGE H. WOOD, OF GREEN BAY, WISCONSIN.

MACHINE FOR POLISHING STONE AND GLASS.

Specification of Letters Patent No. 17,993, dated August 11, 1857.

To all whom it may concern:

Be it known that I, GEORGE H. l/Vooo, of Green Bay, in the county of Brown and State of Wisconsin, have invented a new and Improved Machine for Grindin and Polishing Stone, Glass, and other lflaterials; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 is is a vertical section of my improvement, taken in the line (00) (m) Fig. 2. Fig. 2 is also a vertical section, taken in the line (y) (y) Fig. 1. Fig. 3 is a horizontal section of the same, taken in the line (a) (2.) Fig. 1. Fig. 4: is a detached side view of the device by which the guide and gage frame is counterpoised.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists in the peculiar means employed for polishing stone, glass, and other materials in an expeditious and perfect manner, as will be hereinafter fully shown and described.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A, represents a rectangular frame, in which a vertical frame or gate B is placed; said frame or gate B being fitted between proper guides (a) (a) and allowed to move freely up and down between them.

To each stile (b) of the gate or frame B, a rack (c) is attached, and a pinion (cl) gears into each rack (c), said pinion being on a horizontal shaft 0, placed in proper bearings in the frame A, and having a hand wheel D at one end. A ratchet (e) is also placed on the shaft G, into which a retaining pawl (f) catches, see Fig. 2. The frame or gate B, it will be seen, may be raised and lowered by rotating the shaft C, and it may be secured at any desired point by the pawl (f) and ratchet (e).

V In the frame or gate B, a vertical shaft E is placed. The lower end of this shaft projects below the lower cross-rail of the frame or gate, and has a horizontal arm (9) attached. 7 The lower end of the shaft E passes through a stationary pinion (it),

placed on shaft which is secured permanently to the under slde of the lower cross rail of the frame or gate B. The arm (g) is slotted longitudinally, and an adjustable block (if) is fitted therein by keys A small vertical shaft (j) passes through the block (k said shaft hav ng a pinion (is) on its upper end, which pinion gears into a pinion (Z) placed on an axis (m) whichserves to connect two plates one of which is placed on the lower end of shaft E, and the other is By having the axis (m) of the pinion (-Z) serve as a pivot to connect the two plates (n) (n) and having the block (72. through which the shaft (j) passes connected to one of the plates as shown, it will be seen that the axis of the polisher F, which is the shaft (j) may be placed at a greater or less distance from the shaft E, as the block (M) is allowed to slide and may be secured at any desired point within the slot in the arm The pinion (Z) gears into the stationary pinion (it) as well as into the pinion (is). To the lower end of the small shaft (3') a crossplate (p) is attached, and through each end of the plate (p) a vertical pin (q) passes; said pins being allowed to work freely up and down in the plate (p). The lower ends of the pins (9) are attached to a bar (7') which is attached to the upper surface of a vertical ledge (t) which encompasses a circular metallic plate F, which serves as the polisher, as will be hereinafter shown. A bar (8) crosses the bar (1') at right angles, both bars (1) (8) being attached to the ledge (25). These bars (1') (s) extend some distance beyond the ledge (t) and project over and rest upon an annular plate (a) which is secured to a horizontal frame G.

The frame G has a rack bar (15) passing through each of its corners and fitted in recesses in the uprights of the frame A. The lower ends of the rack-bars have each a nut (21) on them, and the frame G rests on these nuts.

H, H, are two shafts placed in the frame A, each shaft having two pinions (w) (w) placed on it. The pinions (w) (w) gear into the rack-bars (u ),and said pinions also gear into a horizontal rack-bar I, at one side of the frame, see Fig. 1. Consequently it will be seen that by turning one of the shafts H, the four rack bars (10 will be raised and lowered simultaneously.

On the bed J of the frame A, two parallel ways ((4 ((0) are placed, and a car or carriage K, is placed on these ways. A rack (6 is attached longitudinally to the under side of the center rail of the carriage and a pinion (0 gears therein. The pinion (0 is attached to a shaft L, which has two bevel pinions (d1) (d1) at its outer end. M, is a vertical shaft, the lower end of which has a bevel pinion (6 upon it, and the upper end has a pulley (f upon it, around which a belt (9 passes; said belt also passing around a pulley (71 on the shaft E, in the frame or gate B. The upper end of the shaft M is fitted in the end of a plate attached to the frame A, and the lower part of shaft M passes through a sliding plate N, to the inner end of which a pin is attached; said pin fitting in parallel slots (76 (70 made in a plate (Z attached to one side of the carriage K. The ends of the slots (70 (70 are connected by curved terminations, as shown by dotted lines in Fig. 3.

To the end of one of the shafts H, a lever O, is attached. This lever has a counterpoise (m at one end, and also a hand wheel (a The opposite end of the lever 0 works between pins (0 (0 attached to one of the uprights of the frame. pawl (19 is attached to the lever 0; said awl catching into or between the teeth of a ratchet (9 on the shaft H, and adjoining the lever 0; see Fig. 4L.

The operation is as follows: The stone or other article or materialto be polished (shown in red) is placed upon the carriage K; and the frame G is adjusted or placed at a suitable height above the surface of the stone by turning the hand wheel The frame or gate B is also lowered by turning the hand wheel D so that the face or lower surface of the polisher rests upon the stone. The ends of the bars (4") rest upon the annular plate on the frame G. Motion is given the shaft E in any proper manner; and it will be seen that the shaft of the polisher F will be rotated around a point which is of course at the center of the lower end of the shaft E, and said polisher will also, in consequence of the gearing (72,) (Z) (70), have a rotating motion on its aXis in a direction reverse to that given the polisher by the shaft E. In Fig. 3, the black arrow indicates the direction of the movement of the polisher given by the arm (g), and the red arrow indicates the direction of the movement given by the gearing (h) (Z) (70). A compound or double movement is therefore given the polisher; but its rotary movement on or around its own axis or center is quite slow compared with the movement imparted to it direct from the shaft E. The bars (7) (8), working on the plate (a), steady the polisher or serve to guide it; and the polisher feeds itself to its work by its own gravity, for the pins (q) (q) are allowed a certain degree of vertical play in the plate (p), and if the polisher grinds down the distance of the length of said pins before completing the work, the polisher F and frame G must be again lowered by turning the handwheels (M), D. The frame G serves to keep the polisher F in a perfectly horizontal position, and this frame may be adjusted by turning the nuts (4:), so that the parallelism of the stone and polisher may always be preserved.

It will be seen that the frame G also has a certain degree of vertical independent play given it by means of the lever O, fitted between. the pins (0 (0 and this play or movement may be varied by adjusting one of the pins (0 The independent play or movement of the polisher as before stated allows the polisher to feed itself to its work by its own gravity; and the independent play or movement of the frame G allows said frame to conform to the vertical movement of the polisher, and by being arranged as shown may serve to control the extent of the grinding or cutting away of the stone or other article being polished.

As the polisher F is operated, a reciprocating motion is given the carriage K, by means of the shafts M, L, gearing (6 (d (6Z1), pinion (c and rack (5 the slide N being operated by the slots (70 (70 in the plate (Z attached to the carriage K, and the slide causing the pinion (6 to gear alternately into the pinions (d (al and thereby give a reciprocating motion to the carriage. This compound movement of the polisher in connect-ion with the reciproeating movement of the carriage or stone causes a fresh surface of the polisher to be constantly presented to the stone, and the surface of the stone is thereby prevented from being grooved or cut in consequence of the rubbing surfaces working in the same paths, and a regular movement or path given the sand or other material used as a cutting or polishing medium. The surface of the polisher is also made to wear perfectly even, or each point of its surface is subjected to the same wear, and consequently an even face is always preserved.

Sand, emery, or other substance is placed within the ledge (t) on the upper surface of the polisher F; said polisher being perforated wit-h holes (1) through which the sand or other cutting substance is washed to the stone, and between the stone and the polisher.

Having thus described my invention, Whole is arranged to operate conjoinfly as what I claim as new, and desire to secure shown for the purpose specified.

b Letters Patent, is'

The polisher F supported and operated GEORGE WOOD 5 as above described, in combination with the Witnesses:

adjustable guide and gage frame G, and W. TUSOH,

the reciprocating carriage K, When the MUH. HUGHES. 

